I phoned Volvo to get our radio code and our VIN number is not on their database, they think it is imported - Volvo 240 gle K reg I have heard that the radio Volvo TD603 model can be uncovered using serial number and the placings of diodes. Is there anyone that can help with this please? Serial - VO1520C6014006C Picture of diode layout - [URL="http://www.photoscene.co.uk/diode.jpg"]www.photoscene.co.uk/diode.jpg[/URL] Sorry for the quality of the picture, my camera is playing silly beggars.